Contempt is a facial expression you should be aware of. If you see contempt on someone it means they definately don't respect you or your authority. They are questioning your every move and believe they are better than you. Watch for it and squash it immediately or you will have problems.
Deception Tip 19: Contempt is the only asymmetrical facial expression. Liars may display it when targets suggest incorrect, or inept, answers.
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E19 - Contempt - Deception Tips Podcast